Shielding apparatus for a printed circuit board
First Claim
1. A shielding apparatus for shielding electric circuitry mounted on a printed circuit board against interfering electric waves comprising:
- a multi-layer printed circuit board having a circuit trace printed on a middle layer;
a first circuitry block mounted on an outer surface of said multi-layer printed circuit board, said first circuitry block being electrically connected to said circuit trace, so that said first circuitry block is connected to at least one other circuitry block mounted on said multi-layer printed circuit board via said circuit trace; and
metallic plate means covering said first circuitry block to thereby isolate said first circuitry block from said other circuitry block.
1 Assignment
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Accused Products
Abstract
A shielding apparatus for use in a printed circuit board shields electronic circuitry mounted on the printed circuit board against interfering electric waves. The shielding apparatus comprises a multi-layer printed circuit board having a circuit trace printed on a middle layer and a ground trace printed on each of the surface layers. Circuitry blocks consisting of a plurality of electrical elements are mounted on the top surface of the printed circuit board and are electrically connected to one another by the circuit trace. Metallic cases are provided on the top and bottom surfaces of the printed circuit board for covering the circuitry blocks and are in contact with the ground trace.
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Citations
5 Claims
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1. A shielding apparatus for shielding electric circuitry mounted on a printed circuit board against interfering electric waves comprising:
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a multi-layer printed circuit board having a circuit trace printed on a middle layer; a first circuitry block mounted on an outer surface of said multi-layer printed circuit board, said first circuitry block being electrically connected to said circuit trace, so that said first circuitry block is connected to at least one other circuitry block mounted on said multi-layer printed circuit board via said circuit trace; and metallic plate means covering said first circuitry block to thereby isolate said first circuitry block from said other circuitry block. - View Dependent Claims (2, 3, 4, 5)
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Specification